Datamax Allegro 2 manual Adjusting Printhead Pressure and Support, Printhead Mount Assembly

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Troubleshooting

4.2.2 Adjusting Printhead Pressure and Support

The Printer's Printhead support plate requires adjustment if media widths of 3.5" (89mm) or less are used. Figure 4-2 shows the Printhead Mount Assembly, Ribbon Shield, Head Support Plate, and Adjustment Screw in an exploded view.

The Head Support Plate supports the outer end of the Printhead when narrow media is used. Without this support, the Printhead would bear down on the drive roller, causing diminished print quality and premature wear. The Head Support Plate needs to be engaged only when the media width is less than 3.5" (89mm).

To make this adjustment, loosen the two mount screws that fasten the Head to the Support Plate, leaving the screw on the left slightly snug. Load the media and engage the Printhead by rotating the Head-Lift Lever to the ‘down’ position. Turn the adjustment screw clockwise until the support plate moves down and contacts the Bearing Plate underneath. Finally, tighten the two mount screws to secure the Support Plate.

Note: The mount screws that secure the Head Support Plate also secure the Ribbon Shield. When loosening these screws, be aware that both the Plate and the Shield may move.

Figure 4-2 Printhead Mount Assembly

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Allegro2

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Contents Allegro2 Operator’s Manual Part Number Revision A3 Agency Compliance and Approvals Page Important Safety Instructions Page Contents Maintenance Unpacking and Inspection Getting StartedIntroduction Location of Parts on Your Printer Mechanism DetailRear View Tear- off Assembly Installation Tear Bar Assembly InstallationUsing the Printer Control Panel Buttons, Lights and SwitchesGetting Started Light SwitchPaper/Ribbon RibbonLabels Media InstallationInstallation Label Loading Instructions Ribbon Loading Instructions Ribbon LoadingAvailable Modules Using the Printer OptionsTo install a Memory Module Font ROM Modules OptionsCutter 256K and 512K RAM ModulesMedia Rewinder Peel and PresentPresent Sensor Getting Started Allegro2 Checking Voltage Selection Setting Up Your PrinterPower Up Self-Test Test Label Interface Cables Interfacing to the PrinterPart Number Description Connecting to a PC Sample InstallationsConnecting to a CRT Connecting to Your Minicomputer Connecting to Your Non-ASCII DeviceSwitch Settings Switch SettingsBaud Rate Setting the Baud RateBaud 9600 4800 2400 1200 300 Test Word LengthOther Switches Switch Settings and FunctionsProgramming Commands Immediate CommandsSystem-Level Commands Char Description FormatBatch, 1-Cutter Enable Label-Formatting Commands Description FormatSpecial Label-Formatting Commands 10 Font-Loading Commands Programming ExamplesExample line Setting Up Your Printer Allegro2 Creating Labels Using Internal Batch Software Connect Cables Check Link CRT SettingsPrinter Used With a Link CRT Function Default Settings Batch System InitializationVerify Setup, Power Up, and Load Media Menu Screens Formatting and Printing LabelsAvailable Fonts and Barcodes Function KeysLabel Name NEW Label Name ALT-P Screen Description Default Range Print ParametersOther Important Keys Create/Modify Label Screen Print Label Screen HeaderCreating Labels Using Internal Batch Software Sample Label Format Creating Labels Using Internal Batch Software Invalid Font Type Smooth Font Valid BH Ranges Smooth Font InformationNumber OUT of Range Creating Labels Using Internal Batch Software Not Enough Room for Field Data Lines Lhhhvvv Creating Labels Using Internal Batch Software Time and Date Information Format = Day number 1 = MondaySample PrintsPrint Label Screen Print Label ScreenCreating Labels Using Internal Batch Software System Maintenance Screen System Maintenance MenuMetric Reset PrinterCopy Module Print Test LabelQuick Reference Listing Create/Modify Label CommandsCommand Valid Inputs Key Function Print Parameters ALT-PSpecial Keys Troubleshooting Controlling Print Quality Direct-Thermal Stock Mechanical AdjustmentsAligning the Printhead Tag Stock or Stiff MediaPrinthead Alignment Ribbon Feed and Tracking Adjustments Printhead Alignment Procedure Label Stock Tracking Adjustment Fine Printhead Alignment Troubleshooting Allegro2 Adjusting Printhead Pressure and Support Printhead Mount AssemblyPrinter Does Not Print, or Prints Several Labels at once TroubleshootingUnacceptable Print Quality Skips Every Other Label Erratic PrintingRibbon Does Not Advance Unable to print in rotationPrints Light on the Right Side of the Label Printer fails to turn onDrive Roller MaintenanceInterior and Exterior Cleaning Schedule Area Method IntervalCleaning the Printhead Cleaning the PrintheadMaintenance Allegro2 Page Ascii Control Code Chart Appendix aMaintenance Allegro2 Char Hex Dec Page Table B-2 Word Length Appendix B Switch Settings and Cable InterfacingTable B-1 Baud Rate Table B-3 OptionsParamete Default Value Signal PinTable B-1 I/O Port Wiring Table B-2 Printer Default Communication ParametersFonts Appendix CAvailable Fonts and Barcodes Table C-1 Valid Human-Readable Font Ascii CharactersTable C-2 Font Sizes Font 6 62-character alphanumeric, uppercase Available Fonts and Barcodes Table C-3 Barcode Characteristics BarcodesHbic Barcode I Codabar Kmart NON EDI Uppercase R Error CodesLowercase Uppercase TAllegro2 Pin Description Appendix ETable E-1 Printer Interface Cables Table E-2 Printer Pin ConnectionsStraight Cable MXM PC DB25P to Printer ∙ Parallel to Serial Adapter Part Number Figure E-5 Centronics Parallel Interface ConverterAppendix F PrintingFonts BarcodesMedia Label MaterialLabel/Tag Media Specifications Table F-1 Media DimensionsCommunications Interfacing Lights, Buttons, Switch and POTLists of Approved Media ElectricalOptions EnvironmentalPhysical 256K Flash Eeprom Specifications Allegro2 Appendix G PrinterWarranty Service Procedures Thermal PrintheadGeneral Warranty Provisions Limitation of Liability